package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPageQueryDTO;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
	
	@Autowired
	private OrderMapper orderMapper;
	
	@Autowired
	private OrderDetailMapper orderDetailMapper;
	
	@Autowired
	private AddressBookMapper addressBookMapper;
	
	@Autowired
	private ShoppingCartMapper shoppingCartMapper;
	
	@Autowired
	private UserMapper userMapper;
	
	@Autowired
	private WeChatPayUtil weChatPayUtil;
	
	@Autowired
	private WebSocketServer webSocketServer;
	
	/**
	 * 用户下单
	 *
	 * @param ordersSubmitDTO 订单表
	 * @return OrderSubmitVO
	 */
	@Transactional
	public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
		//1.处理各种数据异常的校验
		//地址为空
		AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
		if (addressBook == null) {
			throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
		}
		//购物车数据为空
		Long currentId = BaseContext.getCurrentId();
		ShoppingCart shoppingCart = new ShoppingCart();
		shoppingCart.setId(currentId);
		List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
		if (list == null || list.size() == 0) {
			throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
		}
		//2.向订单表插入一条数据
		Orders orders = new Orders();
		BeanUtils.copyProperties(ordersSubmitDTO, orders);//copy同名数据
		orders.setOrderTime(LocalDateTime.now());
		orders.setPayStatus(Orders.UN_PAID);
		orders.setStatus(Orders.PENDING_PAYMENT);
		orders.setNumber(String.valueOf(System.currentTimeMillis()));//订单号
		orders.setAddress(addressBook.getDetail());
		orders.setPhone(addressBook.getPhone());
		orders.setConsignee(addressBook.getConsignee());
		orders.setUserId(currentId);
		orderMapper.insert(orders);
		//3.向订单明细表插入n条数据
		List<OrderDetail> orderDetailList = new ArrayList<OrderDetail>();
		for (ShoppingCart cart : list) {
			OrderDetail orderDetail = new OrderDetail();
			BeanUtils.copyProperties(cart, orderDetail);
			orderDetail.setOrderId(orders.getId());
			orderDetailList.add(orderDetail);
		}
		
		orderDetailMapper.insertBath(orderDetailList);//批量插入
		//4.清空当前用户的购物车数据
		shoppingCartMapper.DeleteByUserId(currentId);
		//5.封装VO返回结果
		OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder().id(orders.getId())
				.orderTime(LocalDateTime.now())
				.orderNumber(orders.getNumber())
				.orderAmount(orders.getAmount())
				.build();
		
		return orderSubmitVO;
	}
	
	/**
	 * 订单支付
	 *
	 * @param ordersPaymentDTO
	 * @return
	 */
	public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
		// 当前登录用户id
		Long userId = BaseContext.getCurrentId();
		User user = userMapper.getById(userId);
		
		/**
		 * 调用微信支付接口，生成预支付交易单
		 *
		 */

//		JSONObject jsonObject = weChatPayUtil.pay(
//				ordersPaymentDTO.getOrderNumber(), //商户订单号
//				new BigDecimal(0.01), //支付金额，单位 元
//				"苍穹外卖订单", //商品描述
//				user.getOpenid() //微信用户的openid
//		);

//		if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//			throw new OrderBusinessException("该订单已支付");
//		}
//
		OrderPaymentVO vo = new OrderPaymentVO();
		//		vo.setPackageStr(jsonObject.getString("package"));
		
		//TODO 点击确认支付默认当成已支付,完成来单提醒业务
		
		// 根据订单号查询订单
		Orders ordersDB = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());
		// 根据订单id更新订单的状态、支付方式、支付状态、结账时间
		Orders orders = Orders.builder()
				.id(ordersDB.getId())
				.status(Orders.TO_BE_CONFIRMED)
				.payStatus(Orders.PAID)
				.checkoutTime(LocalDateTime.now())
				.build();
		//修改成订单完成
		orderMapper.update(orders);
		
		
		//1.订单支付完成后需要推送
		Map map = new HashMap();
		map.put("type", 1);
		map.put("orderId", ordersDB.getId());
		map.put("content", "订单号：" + ordersPaymentDTO.getOrderNumber());
		
		//2.转成JSON
		String json = JSON.toJSONString(map);
		//3.推送到管理端
		webSocketServer.sendToAllClient(json);
		return vo;
	}
	
	/**
	 * 支付成功，修改订单状态
	 *
	 * @param outTradeNo
	 */
	public void paySuccess(String outTradeNo) {
		
		// 根据订单号查询订单
		Orders ordersDB = orderMapper.getByNumber(outTradeNo);
		
		// 根据订单id更新订单的状态、支付方式、支付状态、结账时间
		Orders orders = Orders.builder()
				.id(ordersDB.getId())
				.status(Orders.TO_BE_CONFIRMED)
				.payStatus(Orders.PAID)
				.checkoutTime(LocalDateTime.now())
				.build();
		
		orderMapper.update(orders);
	}
	
	/**
	 * 用户端订单分页查询
	 *
	 * @param pageNum
	 * @param pageSize
	 * @param status
	 * @return
	 */
	public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
		// 设置分页
		PageHelper.startPage(pageNum, pageSize);
		
		OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
		ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
		ordersPageQueryDTO.setStatus(status);
		
		// 分页条件查询
		Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
		
		List<OrderVO> list = new ArrayList();
		
		// 查询出订单明细，并封装入OrderVO进行响应
		if (page != null && page.getTotal() > 0) {
			for (Orders orders : page) {
				Long orderId = orders.getId();// 订单id
				
				// 查询订单明细
				List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
				
				OrderVO orderVO = new OrderVO();
				BeanUtils.copyProperties(orders, orderVO);
				orderVO.setOrderDetailList(orderDetails);
				
				list.add(orderVO);
			}
		}
		return new PageResult(page.getTotal(), list);
	}
	
	/**
	 * 客户催单
	 * @param id
	 */
	public void reminder(Long id) {
		//根据id查询订单
		Orders ordersDB = orderMapper.getById(id);
		
		//校验订单是否存在
		if (ordersDB == null) {
			throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
		}
		
		Map map = new HashMap();
		map.put("type", 2);
		map.put("orderId", id);
		map.put("content", "订单号" + ordersDB.getNumber());
		
		String json = JSON.toJSONString(map);
		//通过webSocketServer发送消息
		webSocketServer.sendToAllClient(json);
	}
	
	/**
	 * 查询订单详情
	 * @param id
	 * @return
	 */
	public OrderVO details(Long id) {
		
		// 根据id查询订单
		Orders orders = orderMapper.getById(id);
		
		// 查询该订单对应的菜品/套餐明细
		List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
		
		OrderVO orderVO = new OrderVO();
		BeanUtils.copyProperties(orders, orderVO);
		orderVO.setOrderDetailList(orderDetailList);
		
		return orderVO;
	}
	
	/**
	 * 取消订单
	 * @param id
	 */
	public void userCancelById(Long id) {
		Orders orders = orderMapper.getById(id);
		
		if (orders == null) {
			throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
		}
		
		//TODO 用户订单处于待接单状态时，需要进行退款,但我不退
		//支付状态修改为 退款
		orders.setPayStatus(Orders.REFUND);
		
		orders.setStatus(Orders.CANCELLED);
		orders.setCancelTime(LocalDateTime.now());
		orders.setCancelReason("用户取消");
		orderMapper.update(orders);
	}
	
	/**
	 * 订单搜索
	 * @param ordersPageQueryDTO
	 * @return
	 */
	public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
		
		PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
		
		Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
	
		// 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
		List<OrderVO> orderVOList = getOrderVOList(page);
		
		return new PageResult(page.getTotal(), orderVOList);
	}
	
	private List<OrderVO> getOrderVOList(Page<Orders> page) {
		// 需要返回订单菜品信息，自定义OrderVO响应结果
		List<OrderVO> orderVOList = new ArrayList<>();
		
		List<Orders> ordersList = page.getResult();
		if (!CollectionUtils.isEmpty(ordersList)) {
			for (Orders orders : ordersList) {
				// 将共同字段复制到OrderVO
				OrderVO orderVO = new OrderVO();
				BeanUtils.copyProperties(orders, orderVO);
				String orderDishes = getOrderDishesStr(orders);
				
				// 将订单菜品信息封装到orderVO中，并添加到orderVOList
				orderVO.setOrderDishes(orderDishes);
				orderVOList.add(orderVO);
			}
		}
		return orderVOList;
	}
	
	/**
	 * 根据订单id获取菜品信息字符串
	 *
	 * @param orders
	 * @return
	 */
	private String getOrderDishesStr(Orders orders) {
		// 查询订单菜品详情信息（订单中的菜品和数量）
		List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
		
		// 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
		List<String> orderDishList = orderDetailList.stream().map(x -> {
			String orderDish = x.getName() + "*" + x.getNumber() + ";";
			return orderDish;
		}).collect(Collectors.toList());
		
		// 将该订单对应的所有菜品信息拼接在一起
		return String.join("", orderDishList);
	}
}
